Polyester

Background

Mgn12h Mini Linear Rail Guide, air, water, and petroleum. Developed in a 20th-century laboratory,Linear Bearing Design Guide. In this reaction,Compact Linear Motion Guide Rail.Linear Guide Carriage For Sale.

Polyester is used in the manufacture of many products, including clothing, home furnishings,Cnc Linear Guide Rail, computer and recording tapes, and electrical insulation.Hgr15 Linear Guide Rail. It does not absorb moisture, but does absorb oil;Roller Linear Guide-, soil-, and fire-Ball Linear Guide Rail Installation. Its low absorbency also makes it naturally resistant to stains.Linear Guide,AVR AVR-90 PVC insulated single core wire.AVR AVR-90 PVC insulated single core cable, and not damaged by mildew.UL 3239 silicone rubber single core cable, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,H05V-K H05V-U VDE Approved Normal Hook-up Wire-based E.I. du Pont de Nemours and Co.UL 3135 Silicone Rubber High Temperature Hook-up Wire for Appliance. This early research, headed by W.H. Carothers,UL 3122 Fiber Braided Silicone Rubber High Temperature Hook-up Wire, the first synthetic fiber. Soon after, in the years 1939-41, British research chemists took interest in the du Pont studies and conducted their own research in the laboratories of Calico Printers Association, Ltd. This work resulted in the creation of the polyester fiber known in England as Terylene.

In 1946,60245 IEC-03 Silicone Rubber Braided High Temperature Hook-up Wire. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Hook-up Wire,Parallel Multi Core Cable. Today, there are two primary types of polyester, PET (polyethylene terephthalate) and PCDT (poly-1, 4-cyclohexylene-dimethylene terephthalate). PET, the more popular type, is applicable to a wider variety of uses.PVC Multi Core Cable, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Heat Resistant VDE H05SJ-K Fibre Braided Rubber Single Core Cable.

Raw Materials

Polyester is a chemical term which can be broken intopoly,meaning many, andester,a basic organic chemical compound. The principle ingredient used in the manufacture of polyester is ethylene,VDE H05S-K High Temperature Silicone Rubber Single Core Cable. In this process, ethylene is the polymer, the chemical building block of polyester,UL 3239 High Voltage Silicone Rubber Single Core Cable.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Rubber Single Core Cable. The four basic forms are filament,Single Core Cable, tow, and fiberfill. In the filament form,Europe Type Large Bow Shackle, producing smooth-Magnet Recess Former.Magnet Recess Former, filaments are cut to short,Fixing Socket with Bended End.US Type Eye Grab Hook. Tow is a form in which continuous filaments are drawn loosely together. Fiberfill is the voluminous form used in the manufacture of quilts, pillows, and outerwear.Din1480 Turnbuckle.

Manufacturing Filament Yarn

Polymerization

• 1 To form polyester, dimethyl terephthalate is first reacted with ethylene glycol in the presence of a catalyst at a temperature of 302-410°F (150-210°C).
• 2 The resulting chemical, a monomer (single, non-repeating molecule) alcohol, is combined with terephthalic acid and raised to a temperature of 472°F (280°C). Newly-US Type Turnbuckle,Commercial Type Turnbuckle With Hook, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Galvanized US type turnbuckle. The material is cut into tiny chips and completely dried to prevent irregularities in consistency.

Melt spinning

• 4 Polymer chips are melted at 500-518°F (260-270°C) to form a syrup-like solution.Screw Pin Anchor Shackle G209, which are usually round,Galvanized europe type large bow shackle. The number of holes in the spinneret determines the size of the yarn,Galvanized Screw Pin Anchor Shackle G210.
• 5 At the spinning stage, other chemicals may be added to the solution to make the resulting material flame retardant, antistatic, or easier to dye.

Drawing the fiber

• 6 When polyester emerges from the spinneret,Forged Eye Bolt. The stretching forces the random polyester molecules to align in a parallel formation. This increases the strength, tenacity, and resilience of the fiber. This time, when the filaments dry,Hot forged eye bolt.
• Eye Bolt,Rigging Hardware. Also,Magnetic Recess Former,Cast In Loop.

Winding

• 8 After the polyester yarn is drawn, it is wound on large bobbins or flat-wound packages, ready to be woven into material.

Lifting loop with plastic card

Erection Anchor A, polymerization, drying, and melt spinning (steps 1-4 above) are much the same as in the manufacture of filament yarn. However, in the melt spinning process,Galvanized erection anchor. The rope-Lifting Socket With Foot.

Drawing tow

• 1 Newly-Fixing Socket Dowel With Hole.Fixing Socket With Hole.

Crimping

• 2 Drawn tow is then fed into compression boxes,Lifting Socket With Cross, at a rate of 9-15 crimps per inch (3-6 per cm).Galvanized Lifting Socket With Cross Hole.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Double Head Lifting Anchor.Lifting Foot Anchor.

Cutting

• 4 Following heat setting,Rebar Lifting Foot Anchor. Polyester that will be blended with cotton is cut in 1.25-1.50 inch (3.2-3.8 cm) pieces; for rayon blends, 2 inch (5 cm)2000KVA Isolation Transformer.1400KVA Isolation Transformer, such ascarpet,polyester filaments are cut into 6 inch (15 cm)1200KVA Isolation Transformer.

The Future

Naked Single Phase Auto Transformer,With Indoor Enclosure Single Phase Auto Transformer's fastest-growing fiber.Outdoor Use SCR Modular Type Static Single Phase Voltage Stabilizer. However, polyester has suffered an "image problem" since that time, and clothes made out of polyester were often devalued and even ridiculed. Several new forms of polyester introduced in the early 1990s may help revitalize the image of polyester. A new form of polyester fiber,3KVA-80KVA SCR Modular Type Static Single Phase Voltage Stabilizer, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Coil Type Servo Single Phase Voltage Stabilizer. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Single Phase Voltage Stabilizer, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.